package com.liukai.todo.config;

import com.liukai.todo.entity.UserInfo;
import com.liukai.todo.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.ObjectPostProcessor;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.access.intercept.FilterSecurityInterceptor;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private IUserService iUserService;
    @Autowired
//    private CustomFilter customFilter;
//    @Autowired
//    private CustomUrlDecisionManger customUrlDecisionManger;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService()).passwordEncoder(bCryptPasswordEncoder());
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers(
                "/login",
                "/logout",
                "/css/**",
                "/js/**",
                "/index.html",
                "/favicon.ico",
                "/doc.html",
                "/swagger-resources/**",
                "/v2/api-docs/**",
                "/webjars/**",
                "/captcha",
                "/druid/**",
                "/ws/**",
                "/test"
        );
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        //使用JWT 不需要csrf和session
        http.csrf()
                .disable()
                .sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                .anyRequest().authenticated()
                // 动态权限配置
//                .withObjectPostProcessor(new ObjectPostProcessor<FilterSecurityInterceptor>() {
//                    @Override
//                    public <O extends FilterSecurityInterceptor> O postProcess(O obj) {
//                        obj.setAccessDecisionManager(customUrlDecisionManger);
//                        obj.setSecurityMetadataSource(customFilter);
//                        return obj;
//                    }
//                })
                .and()
                // 关闭缓存
                .headers()
                .cacheControl();

        // 添加JWT拦截器
        http.addFilterBefore(jwtAuthenticationTokenFilter(), UsernamePasswordAuthenticationFilter.class);
        // 添加自定义未登录和未授权的结果返回
        http.exceptionHandling()
                .accessDeniedHandler(restfulAccessDeniedHandler())
                .authenticationEntryPoint(restAuthenticationEntryPoint());
    }



    @Override
    @Bean
    public UserDetailsService userDetailsService(){
        return userName -> {
            UserInfo userInfo = iUserService.getUserInfoByUserName(userName);
            System.out.println("userInfo = " + userInfo);
            if (userInfo!=null){
                return userInfo;
            }
            throw new UsernameNotFoundException("用户名或密码不正确");
        };
    }

    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder(){
        return new BCryptPasswordEncoder();
    }

    @Bean
    public JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter(){
        return new JwtAuthenticationTokenFilter();
    }

    @Bean
    public RestAuthenticationEntryPoint restAuthenticationEntryPoint(){
        return new RestAuthenticationEntryPoint();
    }

    @Bean
    public RestfulAccessDeniedHandler restfulAccessDeniedHandler(){
        return new RestfulAccessDeniedHandler();
    }
}
